Automatically makes videos play on highest quality and adds download option with detailed filename.
Filename example: (username_postID - Title)
Crisppyboat_950538 - Courage the Cowardly Dog.mp4
Download button location:
To install this, you need a User Script manager installed in your browser.
There are plenty of options such as Tamper Monkey or Violent Monkey. Install one of these to your browser.
Then click this link to install the user-script from this repo directly.
(Or go and directly view the "RAW" of newgrounds_enhancer.user.js)
Your User-Script manager should take you to an install page.